Fire-box back for ranges



June" 17, 1924. 1,497,910 J. w. JACK FIRE BOX BACK FOR RANGES Filed Nov. 1 1922 IN VEN'FOR JOSEPH WILLIAM JACK ATTORNEYS box back.

El) STATES PATENT OFFICE.

JOSEPH WILLIAM JACK, OF VICTORIA, CANADA.

FIRE-BOX BACK FOR RANGES.

Application filed November 16, 1922. Serial No. 601,434.

To all whom it may concern:

Be it known that I, Josnrn WILLIAM JACK, a resident of'the city of Victoria, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Fire-Box Backs for Ranges, of which the following is a specification.

M invention relates to improvements in fire backs for cooking ranges and the like, and the object of the invention is to obviate the tendency of the back to warp or burn out, which frequently occurs in backs of common design.

A further object is to prevent undue heat F being imparted to that part of the range oven which is in close proximity to the back, and by which the oven casing is burned out, greatly impairing the value and utility of the range.

My invention consists essentially of a fire box back having a tubular passage longitudinally thereof through which a flow of water is directed which will be more particularly explained in the following specification in which Fig. l is a perspective View of my fire Fig. 2 is a sectional view taken on the line 2,2 of Fig. 1. i.

In the drawings like characters of reference indicate corresponding parts in each figure.

The numeral 1 indicates, in general, the tire box back which is substantially rectangular in form and is backwardly curved along its upper edge as indicated at 2. 3 is an ovaliform enlargement extending longitudinally of the back and adjacent the curved upper portion in which is formed a tubular passage 4, indicated in Fig. 1 by dotted lines. I

The opposite ends of the passage 4 are tapped for the reception of pipe nipples 5 by which connection is made to the water supply.

lVhile in the fire box back shown, the tubular passage is cast integrally with the back, it may be deemed advisable to cast the several parts separately and join them together in a suitable manner without departing from the spirit of the invention.

Having thus described the several parts of my invention I will now briefly explain its setting and use.

The fire box back is set in the fire box of a range in the usual manner, and is preferably connected by one of the nipples 5 to the flow pipe of the Water front, and connected at its opposite end to the boiler of the hot water service, so that partially heated water may be caused to flow therethrough, though any other circulating water supply may be used.

The water passing through the passage 4 being of a lower temperature than the heat from the fire which is in contact with the back, produces a cooling effect to the several portions of the back thus preventing the back from warping or burning out, thus adding to the durability of the back and the parts of range against which the back is placed.

What I claim as my invention isl. A fire box back consisting of a plate formed with a lower straight web portion, an upper rearwardly curved web portion, and an intermediate connecting portion formed with a passage extending longitudinally therethrough through which a cooling medium is adapted to flow.

2. A. fire box back comprising upper and lower web portions integrally connected along their adjacent edges by an intervening tubular portion affording a fluid passage open at both ends and coupling nipples projecting from thesaid ends of the passage to connect same to a source of fluid supply. I

Dated at Victoria, B. C. this 14th day of September, 1922.

JOSEPH lVILLIAM JACK. lVitnesses:

I J. J. J oI-INsToN,

ERNEST E. CARVER. 

